The shelf life of Bigelow tea can vary depending on the specific type of tea and how it is stored. Generally, unopened tea bags can last for about 18 to 24 months from the date of manufacture when stored in a cool, dry place away from direct sunlight and moisture. Once the packages are opened, the tea is best consumed within six months for optimal freshness and flavor. To maintain the tea's quality, it is advisable to keep it in an airtight container if it has already been opened. While the tea may still be safe to consume after these time frames, the taste and aroma may diminish over time. It is always a good practice to check the packaging for any specific best-by dates or guideline information from Bigelow Tea.